Double chain collar keeper



FIG. 1 is a front elevational view of a double chain collar keeper showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a side elevational view; and,

FIG. 4 is a partial rear elevational view, with part of the collar keeper removed for ease of illustration, the portion not shown being a mirror image. 

The ornamental design for a double chain collar keeper, as shown and described. 